[2] Born in Rhode Island to Joseph and Hildegard Slocum, his family moved to New Braunfels, Texas, when he was eight months old, and opened a book store.

[3] In 1991, while a senior at New Braunfels High School,[4] Slocum played guitar with Chris Taylor on a garage-band tape release called A Place to Hide Away (Part 1).

He was a member of Love Coma, a Christian rock band, and in the early 1990s he met vocalist Leigh Bingham Nash while attending the same church in New Braunfels, Texas.

Slocum and Leigh formed Sixpence None the Richer; he and Nash are the band's only constant members.

As studio guitarist and cellist, he has recorded on albums by artists Julie Miller, Plumb, Wes King, Switchfoot, Hammock, Lost Dogs, The Choir, Dividing the Plunder, Threefold, and Brooke Waggoner.